THE JOURNAL OF MICROSCOPY AND NATURAL SCIENCE: THE JOURNAL OF THE POSTAL MICROSCOPICAL SOCIETY. Editor: ALFRED ALLEN, Hon. Sec. P.M.S. Associate Editors : PROF. V. A. LATHAM, D.D.S., F.R.M.S., ETC., FREDK. GAERTNER, A.M., M.D., J. STEVENSON BROWN, President Montreal Micro. Soc., FILANDRO VICENTINI, M.D., Chieti, Italy. VOL. III. THIRD SERIES. VOL. XII. OLD SERIES. London: BAILLIERE, TINDALL, & COX, 20 KING WILLIAM ST., STRAND. THE INTERNATIONAL JOURNAL OF MICROSCOPY & NATURAL SCIENCE: THE JOURNAL OF THE POSTAL MICROSCOPICAL SOCIETY. Knowledge is not given us to keep, but to impart; its worth is lost in concealment." [The Editor does not hold himself responsible for the views of the authors of the papers published.] Presidential Address. Polarised Light and its Applications to the Microscope. PRESIDENTIAL ADDRESS BY G. H. BRYAN, M.A. N a recent occasion, Lord Kelvin (or rather Sir William Thomson, for he had not then risen to the rank of a "scientific peer "), in the course of a highly interesting lecture on "Motivity," remarked, with reference to the Second Law of Thermodynamics, that he would not attempt to explain the law that evening, "for," as he said, "it could not be explained satisfactorily with less than six hours of tutorial instruction." Now, the same thing is true of polarised light, but with this difference, that to explain that thoroughly, about twelve hours of " tutorial instruction" would be about the minimum. In the short space at my disposal, it will not INTERNATIONAL JOURNAL OF MICROSCOPY AND NATURAL SCIENCE. B |